Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 12: Ultra-cold atoms, ions and BEC (with A)
Q 12.36: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Development of a deterministic ion source — •Jens Benary, Andreas Müllers, Cihan Sahin, and Herwig Ott — Technische Universität Kaiserslautern
We present a deterministic ion source based on an ultracold atom cloud. 87Rb atoms are confined in a magneto-optical trap (MOT) and subsequently photo-ionized. The fast electrons are detected with a channel electron multiplier (CEM) and act as a trigger for the ions.
In addition to photoionization, we are implementing a three photon excitation to Rydberg states. Using the mechanism of Rydberg blockade, the source could be adapted to control the number of emitted ions down to a single particle.
Currently, the ions are detected with a second CEM. However, future applications may include ion interferometry or semiconductor doping. These will benefit from the high repetition rate and low energy spread of this type of source.
The three photon excitation via the intermediate 5P3/2 and 5D5/2 states gives access to nP or nF Rydberg states. This can be realized in a simple manner using IR diode lasers with wavelengths between 776 nm and 1260 nm. In addition, the 5D5/2 state has a decay channel to 6P3/2, which can be excited to nS or nD Rydberg states with an additional laser at 1016 nm.
We discuss the status of the experiment and present results obtained so far.